There are more nerve cells in one human brain than there are stars in the Milky Way.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
